Connecting the external test sets
R&S
®
ZNA67EXT
36
Getting Started 1179.6295.02 ─ 02
8.2
RF and LO cabling
The following RF and LO connections must be established for each external test
set.
Table 8-2: RF and LO connections
R&S
ZNA67 connector
Ext. test set connector
Used at frequencies
Port
p
Source Out
Diplexer
p
RF IN
LOW / HIGH
Port
p
Ref In
Diplexer
p
REF OUT
LOW
Port
p
Meas In
Diplexer
p
MEAS OUT
LOW
Conv LO Out
Converter
p
LO IN via power
divider
HIGH
p
= 1, 2 for systems with 2 external test sets
p
= 1, ..., 4 for systems with 4 external test sets
Some of the RF connections are only used while the network analyzer oper-
ates in the low frequency range (below approx. 67
GHz) or in the high fre-
quency range (above approx. 67
GHz). However, to ensure full flexibility and
maximum accuracy, it is recommended to establish all RF connections.
To get accurate measurement results, use high-quality cables with low attenua-
tion and excellent phase stability. Rohde&Schwarz offers suitable cable sets fro
GORE
®
RF input power
The RF input power at the connectors RF IN and LO IN of the converters
must not exceed the maximum values quoted in the data sheet. Because
these maximum values are below the maximum RF source power of the
R&S
ZNA, the R&S
ZNA has to be configured carefully, before establishing
these connections. Selecting the "ZNA67EXT-TS" converter type ensures
compatible source powers (see
Chapter 9.2, "Converter configuration"
RF and LO cabling